JPS6146205B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a hemming device suitable for edge bending a peripheral flange portion of a flat workpiece.

FIG. 1 shows a state in which a flange portion 2A of an outer panel 2 as a workpiece 1 is bent from a substantially right angle state to a state where an inner panel 3 can be held by a conventional hemming method. It is an explanatory diagram. That is, the flange portion 2 is in a substantially right-angled state.
After the outer panel 2 and the inner panel 3 are arranged in a state where they can be supported on the support surface 5 of the support base 4, the outer panel 2 provided with A is provided with a pre-bending edge 6 that enters the support surface 5 of the support base 4 from a substantially horizontal direction. The flange portion 2A is pre-bent to a pre-bending angle β by the pre-bending portion 7, and after this pre-bending blade 6 is returned to its original position, it enters the support surface 5 of the support base 4 from a substantially perpendicular direction. The flange portion 2A pre-bent by the main bending portion 9 of the bending blade 8 is bent to a completed state in which the inner panel 3 can be held.

However, in the case of the hemming method according to the conventional example, the preliminary bending process of the flange portion 2A and the subsequent bending process until the edge bending is completed are performed using the preliminary bending blade 6 and the bending process which are independent of each other. Since the hemming process is achieved by the hemming blade 8, in addition to the bending blade 8 and its drive device, the pre-bending blade 6 and its drive device are required, and therefore, the hemming process method and device are There are problems in that it becomes more complex and the work space and space occupied by the device become larger.

The present invention has been made in view of the above-mentioned conventional problems, and provides a hemming device that can perform a preliminary bending process and a main bending process continuously using a single bending blade. The purpose is to

In order to achieve the above object, the hemming processing device according to the present invention includes a support base that supports a flat workpiece at a processing position, and a support base that can move toward and away from the flange of the workpiece from an oblique direction. A hemming processing device having a bending blade, the bending blade having a pre-bending portion formed as a surface intersecting the direction of advance and retreat of the hemming blade, and a surface intersecting the pre-bending portion with the supporting base surface. and a main bending part formed in a plane parallel to the main bending part, so that continuous processing from preliminary bending to completion of edge bending can be performed by the unidirectional advancing movement of the bending blade.

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 2 is an explanatory diagram showing one embodiment of the present invention. A cradle 12 and a support base 13 are arranged on the frame 11. The pedestal 12 is capable of placing an outer panel 15 and an inner panel 17 as a flat plate-shaped workpiece 14 so as to be positioned and held by a holding device 18 at the processing position. The support base 13 is capable of supporting the workpiece 14, which is positioned and held on the pedestal 12, by the support surface 13A during edge bending. Here, the flange portion 16 of the outer panel 15 to be edge bent is bent at an approximately right angle of 70 degrees < α < 110 degrees with respect to the support surface 13A of the support base 13, as shown in FIG. It is given.

Further, the frame 11 is provided with a column 19, and a bending cylinder device 20 is supported by a trunnion in a substantially inclined state on the column 19. The head 21 connected to the tip of the piston rod of the bending cylinder device 20 is guided by a guide 22 provided on the frame 11, and is guided at an approach angle θ with respect to a substantially horizontal plane formed by the support surface 13A of the support base 13.
It is possible to move forward and backward in the direction of inclination.

A bending blade 23 is fixed to the tip of this head 21. The bending blade 23 has an outer panel 15
a pre-bending part 24 that abuts the tip of the flange part 16 which is bent at a substantially right angle at a relative angle γ, and pre-bends the flange part 16 to an acute angle state at an angle α with respect to the support surface 13A of the support base 13; The main bending part 25 is provided for bending the flange part 16, which is pre-bent at an acute angle by the preliminary bending part 24, to a completely bent state. That is, the bending blade 23 approaches the flange portion 16 of the outer panel 15 at an approach angle θ due to the extension operation of the bending cylinder device 20, pre-bends the flange portion 16 by the pre-bending portion 24, and then moves to the main bending portion 25.
By this, it is possible to bend the edges until the edge bending is completed.

Next, the operation of the above embodiment will be explained.

The outer panel 15 having the flange portion 16 bent at a substantially right angle and the inner panel 17 have their edge bent portions aligned with the support surface 13 of the support base 13.
It is positioned and placed on the pedestal 12 so that it can be supported by the supporter A, and is held by the holding device 18. Next, the bending cylinder device 20 is extended from its contracted position, and the bending blade 23 is guided by the guide 22 of the head 21 to enter the support surface 5 of the support base 4 from diagonally above at an entry angle θ. The pre-bending portion 24 of the bending blade 23 starts contacting the flange portion 16 when the pre-bending portion 24 forms an angle γ with the flange portion 16 . When the bending blade 23 advances further, the pre-bending portion 24 pre-bends the flange portion 16 to a substantially acute angle state. Bending blade 2
3 continues to enter, the flange part 16 starts contacting with the main bending part 25, and the flange part 16 becomes substantially parallel to the support surface 13A, and the edge bending is completed in which the inner panel 17 can be held. The edges are bent until the edges are bent. In this way, when the flange portion 16 of the outer panel 15 completes the edge bending, the bending cylinder device 20 is operated to contract, and the bending blade 23
returns to its original position diagonally above the support base 13 and remains there.

According to the above embodiment, the flange portion 16 of the outer panel 15 in the substantially right angle state has a single bending edge 2.
The three successive steps make it possible to perform the pre-bending operation and the bending operation, thereby simplifying the device and reducing the space it occupies. In addition, since the bending blade 23 continuously operates from the preliminary bending state to the edge bending completed state,
It is also possible to improve work efficiency.

As described above, the hemming device according to the present invention has the effect that preliminary bending and main bending can be performed continuously using a single bending blade.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing a state of edge bending according to a conventional hemming method, FIG. 2 is a front view showing an embodiment of the present invention, and FIG. 3 is a diagram showing a state of edge bending according to the same embodiment. It is an explanatory diagram. 13... Support base, 14... Workpiece, 16
...Flange part, 23...Bending blade, 24...Preliminary bending part, 25...Main bending part.

Claims (1)

[Claims] 1. A hemming device having a support base that supports a flat workpiece at a processing position, and a bending blade that moves forward and backward toward and away from the flange of the workpiece in an oblique direction, the bending blade The main bending portion is provided with a preliminary bending portion formed as a plane that intersects with the advance/retreat direction thereof, and a main bending portion formed on a plane that intersects with the preliminary bending portion and parallel to the support base surface. A hemming processing device featuring: