JPH01170531A - Double action press device having welding head - Google Patents

Abstract

PURPOSE:To weld a waiting work while an upper die outer member fixes the work and to shorten a forming cycle time by providing a welding head on the upper die outer member so that the welding head on the upper die outer member so that the welding head is descended interlocking is descending operation of the outer member of the upper die. CONSTITUTION:When the upper die outer member 3 fixes a work W, a welding head 9 is descended interlocking a descending operation and a lapped part of 1st and 2nd component W1, W2 is put between an electrode 8 and an electrode 13 of another welding head 14. When the work W is fixed by the upper die outer member 3, that is, when the work W is pressed by the upper die inner member 4 descended thereafter, welding is performed to a work W waiting for the next press work, namely, the 1st and 2nd component W1, W2. Accordingly, the cycle time can be reduced.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention relates to an improvement of a double action press device used for drawing a workpiece (blank) such as a steel plate, and in particular has a welding function in addition to a press function. Regarding those that have been added.

(Prior Art) In general, a double action press mounting device, as disclosed in Japanese Utility Model Application Publication No. 61-152337, for example,
The work placed on the lower die is clamped and fixed between the lower die blank hold part and the upper die outer member by the lowering movement of the upper die outer member placed above the blank hold part, and in this state, the upper die outer member is placed above the blank hold part. By lowering the mold inner member, the workpiece is pressed.

By the way, when a workpiece to be subjected to press processing is composed of two members, it is difficult to transport the image constituent members into a press machine in a state in which they are positioned without shifting. Conventionally, a method has generally been adopted in which the above-mentioned structural members are once temporarily fixed by welding in a process separate from the pressing process, and then the temporarily fixed structural members are carried into a press machine and pressed.

(Problems to be Solved by the Invention) However, in the conventional method described above, since a welding process is required in addition to the pressing process, there is a problem in that the molding cycle time becomes longer.

The present invention has been made in view of the above, and its object is to provide an upper mold outer that clamps and fixes a workpiece placed on a lower mold between a lower mold blank holding part and a lower mold blank holding part in a pre-pressing stage. By taking appropriate measures on the part, it is possible to weld the workpiece while it is being fixed by the upper die outer member, that is, during press processing by the upper die inner member, for the next press work (while the workpiece is waiting). The purpose of this is to shorten the molding cycle time by the time required for the welding operation compared to the case where the welding operation is performed separately from the pressing operation.

(Means for Solving the Problems) In order to achieve the above object, the solving means of the present invention includes a lower mold having a workpiece forming recess and a blank holding part provided on the outer periphery of the recess, and An upper mold outer member that is movably arranged above the blank hold part of the mold and clamps and fixes a workpiece placed on the lower mold between the lower mold blank hold part by a descending movement, and an inner side of the upper mold outer member. and an upper die inner member which is arranged to be movable up and down, has a convex portion corresponding to the concave portion of the lower die, and presses the workpiece after fixing with the convex portion in a descending motion. In this case, a welding head is provided on the upper outer member of the upper mold, and the welding head is lowered in conjunction with the lowering movement of the upper outer member, and the next Welding is performed on workpieces waiting for press processing.

(Function) With the above configuration, in the present invention, the workpiece placed on the lower mold is clamped and fixed between the upper mold outer member and the lower mold blank holding part by the lowering movement of the upper mold outer member,
Thereafter, the upper die inner member is pressed by its convex portion by the downward movement.

In this case, the upper mold outer member is provided with a welding head that descends in conjunction with the lowering movement of the upper mold outer member and performs welding on the workpiece that is waiting for the next press processing. In this case, while the workpiece is being fixed by the upper mold outer member, that is, during press processing by the upper mold inner member, a workpiece waiting for the next press processing is welded, and the welding work is performed separately from the pressing work. The molding cycle time can be shortened by the amount of time required for welding work.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 shows a double action press device A according to an embodiment of the present invention, in which 1 is a workpiece forming recess 1a on the upper surface and a blank holder 1 integrally formed on the outer periphery of the recess 1a.
2 is an upper mold disposed above the lower mold 1, and the upper mold 2 is an upper mold movably disposed above the blank holding part 1b of the lower mold 1. Outer member 3
and an upper mold inner member 4 disposed inside the upper mold outer member 3 so as to be movable up and down.

The upper mold outer member 3 was placed on the lower mold 1 prior to press working. The first component W1 and the second component W
2 (for example, a steel plate for a center pillar constituting an automobile body) is clamped and fixed between the blank holding part 1b of the lower mold 1 by a downward movement as shown by the imaginary line. is being done.

On the other hand, the upper mold inch member 4 is connected to the recess 1a of the lower mold 1.
After the workpiece W is fixed by the upper mold outer member 3, the workpiece W is pressed by the projection 4a by a downward movement as shown by the imaginary line. .

Further, a support member 5 extending outward is integrally provided on the outer wall of the upper mold outer member 3, and a through hole 5a penetrating the support member 5 in the vertical direction has a lower half portion of the dowel for protection. A guide rod 7 covered by a cover 6 is fitted and supported so as to be movable in the vertical direction. As a feature of the present invention, an electrode 8 is attached to the lower end of the guide rod 7 at the tip (
A welding head 9 provided on the lower end) side is fixed, and the welding head 9 has a flange 9a formed on the base end (upper end) side.
The support member 5 is constantly urged downward by the spring force of a coil spring 10 compressed between the support member 5 and the lower surface of the support member 5.

Further, on the side of the lower mold 1 and below the welding head 9, there is a support 11 that supports one end of the workpiece W to be welded (the end of the first component w1 on the right side in the figure); A positioning pin 12 that positions and supports the other end of the workpiece W (the end of the second component W2 on the left side in the figure), and a positioning pin 12 that supports the overlapping portion (where welding is performed) of the first and second component W+ and W2. Another welding head 14, which also serves as a support, is disposed below the welding head 9 and has an electrode 13 at its tip (upper end). As shown by the imaginary line, the welding head 9 is lowered in conjunction with the lowering operation of the upper mold outer member 3 when fixing the workpiece W, and the welding head 9 is lowered to connect the electrode 8 and the other welding head 14. with the electrode 13 of the first and second constituent members W
While the workpiece W is being fixed by the upper mold outer member 3 with the overlapping portion of the parts L and W2 sandwiched between them, that is, while the workpiece W is being pressed by the upper mold inch member 4 that has descended thereafter, the workpiece is waiting to be subjected to the next press processing. Welding is performed on W1, that is, the first and second component members W1°w2.

As described above, in this embodiment, the welding head 9 is lowered in conjunction with the lowering movement of the upper die outer member 3 when fixing the workpiece W, and the next press process is performed while the workpiece W is being fixed by the upper die outer member 3. Since welding is performed on the workpiece W that is on standby for use, the forming cycle time can be shortened by the time required for the welding work, compared to the case where this welding work is performed separately from the pressing work.

(Effects of the Invention) As explained above, according to the present invention, the welding head is attached to the upper mold outer member 3 that clamps and fixes the workpiece with the blank holding part of the lower mold, and the welding head is moved by the lowering movement of the upper mold outer member. Since it is arranged to descend in conjunction with the upper mold outer member, it is possible to weld a workpiece waiting for the next press process while the workpiece is being fixed by the upper die outer member, thereby shortening the molding cycle time by that much. Can be done.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing a welding head portion of a double action press device according to an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Lower mold, 1a... Recessed part, 1b... Blank hold part, 2... Upper mold, 3... Upper mold outer member, 4
...Upper inch member, 4a...Protrusion, 9...Welding head, A...Double action press device, W...
·work. Patent applicant Mazda Motor Corporation representative
In front of people 1) Hiroshi ゛ −−1゛

Claims (1)

[Claims] (1) A lower mold having a workpiece forming recess and a blank holding part provided on the outer periphery of the recess, and a lower mold that is arranged so as to be movable up and down above the blank hold part of the lower mold, and a workpiece placed on the lower mold. an upper mold outer member which is clamped and fixed by a lower mold blank holding part during a descending movement; and a convex portion which is disposed inside the upper mold outer member so as to be movable up and down and corresponds to the recessed portion of the lower mold, and In a double-action press device, the upper mold includes an upper mold inner member and an upper mold inner member that presses the workpiece after fixing with a convex part in a descending motion. A double-action press device having a welding head, characterized in that the welding head is lowered in conjunction with the lowering movement of a member and performs welding on a waiting workpiece for the next press processing.