JPS6135306Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a sub-lifter with a movable gauge used during press bending of a workpiece.

Generally, when bending workpieces made of two or more materials or different materials in the same press process, the edges of the workpieces end in curvature due to the differences between the materials, and the edge dimensions in the free state of the workpieces change. There was a problem. In addition, when placing a workpiece into a curved shape that is positioned using a workpiece edge, conventionally a guide gauge fixed on the lifter is used, which causes the position of the workpiece edge to change slightly, resulting in a decrease in product quality. I was getting used to it. In order to prevent this, it is necessary to loosen the bolts fixing the guide gauge and adjust the gauge position each time the material of the workpiece is changed, which is extremely complicated.

The present invention is intended to solve the above-mentioned problem.The guide gauge, which is slidably provided on the sub-lifter, is normally biased in the direction away from the press die, and the fixed cam provided on the upper die of the press die is used. By configuring the guide gauge to be driven to a predetermined position in conjunction with the push-down stroke of the workpiece, the edge of the workpiece can be positioned reliably, producing a high-quality product with few dimensional errors, and the material of the workpiece, Even if the material changes, the position of the guide gauge can be adjusted automatically.
To provide a sub-lifter with a movable gauge that improves work efficiency by eliminating the time and effort required to adjust the position of a conventional guide gauge.

An embodiment of the present invention will be described below based on the drawings.

In Fig. 1, 1 is a sub-lifter plate,
A rising part 1a at the left end, a flat part 1b at the upper center,
It has a rising portion 1c at the right end. A passive cam 2 is provided on the flat part 1b of the sub-lifter plate 1 so as to be slidable with respect to the press mold. The passive cam 2 has an approximately inverted T-shaped cross section with a rising part forming an inclined surface 2a at the upper center, and a rod 3 is inserted into the left side of the passive cam 2 through a hole in the rising part 1a of the sub-plate 1. It is screwed on. Further, a spring 4 is wound around the intermediate portion of the rod 3 protruding from the sub-lifter 1, and urges the passive cam 2 in a direction away from the press die 7 consisting of the upper die 5 and the lower die 6. There is. Press mold 7 of passive cam 2
A guide gauge 8 is attached to the side portion.

The guide gauge 8 has a workpiece guide surface 8a on the side facing the press die 7 for guiding and regulating the edge portion of the workpiece 9 that is introduced into the lower die 6 of the curved shape. A fixed cam 10 fixed to the side of the upper die 5 is attached above the passive cam 2. This fixed cam 10 is approximately T-shaped and has an upper mold 5 at the bottom.
An inclined surface 10a is provided which comes into contact with the inclined surface 2a of the driven cam 2 when the driven cam 2 descends. In the figure, reference numeral 11 denotes a pressing member that presses against the upper end of the upper die 6 to perform bending. Reference numeral 12 denotes a cylindrical support member integrally provided at the lower part of the sub-lifter plate 1, and a guide groove 12 is provided in the outer periphery of the support member 12 in the vertical direction.
a is formed, and the support member 12 is fitted into a hole 13 formed in the side of the lower mold 6 so as to be slidable in the vertical direction. The support member 12 is always urged toward the fixed cam 10 by a spring 14, and the lower die 6
The locking piece 15 provided in the hole 13 is engaged with the guide groove 12 to slide within a predetermined range.

In the present invention having the above-mentioned configuration, when the workpiece 9 is put between the lower mold 6 and the upper mold 5 and the upper mold 5 descends, the inclined surface 10a of the fixed cam 10 first moves as shown in FIG. The passive cam 2 contacts and slides on the inclined surface 2a of the passive cam 2, and as a result, the passive cam 2 moves in the horizontal direction, and the work guide surface 8a of the guide gauge 8 touches the lower die 6.
The edge portion of the workpiece 9 bent downward on the curved surface is pressed along the curved surface of the lower mold 6, and is automatically and reliably positioned at the upper end of the lower mold 6. In this state, the gap l between the edge portion of the work 9 and the lower die 6 due to the material of the work 9 is corrected, so that dimensional errors will no longer occur. Next, when the upper die 5 is further lowered, the workpiece 9 is held between the upper die 5 and the lower die 6, and then the guide gauge 8 is lowered. Then, the fixed cam 10 and the pressing member 11
further descends, and as shown in Figure 3, the work 9
The edge portion of the workpiece 9 is pressed against the side surface of the lower die 6 by the pressing member 11, and the edge portion of the workpiece 9 is bent.

Then, when a bent part is formed at the edge of the workpiece 9 and the upper mold 5 is lifted upward, the force of the fixed cam 10 pressing against the passive cam 2 is released, and the passive cam 2 is moved by the spring 4. The force will return it to its original state. In this way, the workpieces 9 are fed into the press die 7 one after another, and high-quality products (panels, etc.) with few dimensional errors are produced.

As described above, in the present invention, the guide gauge is slidably provided on the sub-lifter, is always biased in a direction away from the press mold direction, and is driven to a predetermined position by the pressing stroke of the fixed cam. With this configuration, the edge of the workpiece can be reliably positioned during the press process, and high-quality products (panels, etc.) with few dimensional errors can be manufactured. The position of the guide gauge can also be automatically adjusted, which has the effect of eliminating the effort required to adjust the position of the guide gauge in the past and improving work efficiency.

In addition, in the present invention, the workpiece is positioned as the upper die 5 descends, and the guide gauge is further lowered when the upper die 5 descends. In other words, these series of operations are performed continuously, so the machining time is reduced. This will result in a reduction in the time required.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing an embodiment of the present invention, and FIGS. 2 and 3 are sectional views of essential parts showing the operating state of FIG. 1. 1...Sub lifter plate (sub lifter), 2
... Passive cam, 5 ... Upper mold, 8 ... Guide gauge,
10...Fixed cam.

Claims (1)

[Scope of utility model registration request] A sub-lifter that is elastically biased upward is provided on the side of the pre-mold consisting of an upper mold and a lower mold, and is movable vertically.
A passive cam and a guide gauge that can freely come into contact with the edge of the workpiece placed on the lower die are slidably provided on the sub-lifter so that the guide gauge is positioned closer to the press die than the passive cam, resiliently biasing the passive cam in a direction away from the press die and fixing the guide gauge to the passive cam;
Further, a fixed cam, which is slidably engaged with the passive cam and moves the guide gauge a predetermined distance in the direction of the press die against a resilient urging force, and the upper die and the lower die are attached to the upper die. and a pressing member for bending the work clamped by the upper mold, and the upper mold contacts the lower mold and clamps the work after the guiding guide contacts the work and positions the work. Features a sub-lifter with a movable gauge.