JPH0422526A - Transfer system press working device - Google Patents

Abstract

PURPOSE:To shorten the cycle time by providing the scrap breaker which presses the scrap downward just after trimming and drops down to the feed bar. CONSTITUTION:When the feed bar 2 takes the clamping movement after waiting that the upper die elavates and the work W is lifted up with the lifter to the transfer waiting position P, the scrap breaker 15 is brought into contact with the scrap part S. When the feed bar 2 is transfered further toward the clamping limit position, the scrap breaker 15 presses the scrap part S down by rotating to the anti-clock's direction with the axis 14 as the rotating center. As a result, the scrap part S comes out among the scrap cutters and drops by gravity and further slips down on the scrap chute 10 and it is collected with the scrap conveyer, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a transfer type press processing apparatus equipped with a transfer device, and more specifically to a press processing apparatus for trimming a non-product area attached to a workpiece. Regarding.

Conventional technology As shown in Japanese Patent Publication No. 61-50058, for example, the purpose is to trim non-product areas such as drawing walls attached to the periphery of a drawn workpiece. In such a press processing apparatus, at the same time as trimming, scraps generated by trimming are cut into short pieces using scrap cutters attached to the upper and lower dies. In this case, the scrap pieces cut by the scrap cutter do not fall smoothly due to their own weight, and remain stuck in the opposing gap between adjacent scrap cutters on the lower die side, which may interfere with the next press operation. be.

Specifically, as shown in FIG. 7, the frame-shaped non-product area S attached to the periphery of the workpiece W is separated by the scrap cutter 31 on the lower die side and the scrap cutter 32 on the upper die side. Due to the shearing action, a plurality of short scrap pieces S l+S! are formed as shown in FIG. , S, but the scrap piece S sandwiched between the scrap cutters 31 and 31 may remain stretched between the scrap cutters 31 and 31 and may not fall smoothly under its own weight. .

Therefore, as shown in FIG. 9 as well as FIG. 7, a breaker 35 is provided in the feed bar (transfer bar) 33 of the transfer device for transporting the workpiece, in addition to the gripper 34.
Prior to lifting up the workpiece W after trimming by the up operation of the feed bar 33 to the conveyance height position P1 by the gripper 34, the feed bar 33 is once moved from the intermediate position Q to the lowering limit position Q by a predetermined stroke talk. The feed bar 33 is lowered, and the feed bar 33 is raised all at once from this lowering limit position Q to the transport height position P of the workpiece W.

As shown in FIG. 10, the feed bar 33 performs a three-dimensional movement of clamp → up → advance (forward) → down → up clamp → return (retreat).

According to this method, the breaker 35 comes into contact with the scrap piece SI while the feed bar 33 is lowered from the intermediate position Q to the lower limit position Q, so that the scrap piece S is forcibly pushed down. It will fall through a scrap chute 37 attached to the lower die 36.

Here, the workpiece W after trimming is lifted up by a lifter (not shown) to a transfer standby position P above the lower die 36 as shown in FIG. The workpiece W is transported to the next process by the feed bar 33 moving in a direction perpendicular to the plane of FIG. 9 (advance operation).

On the other hand, as another method for forcibly dropping the scrap piece Sl, as shown in FIG. A fluid spring type breaker 40 filled with a predetermined fluid is provided, and immediately after the scrap piece SI is trimmed, the scrap piece SI is forcibly dropped by the subsong groove J of the breaker 40. Note that 41 is a pad, and 42 is an upper holder to which the sectional die 38 is attached and constitutes an upper die together with the pad 38.

Problem to be Solved by the Invention In the former method shown in FIGS. 7 and 9, the movement of the feed bar 33 from the intermediate position Q1 to the lower limit position Q is an extra movement that does not directly contribute to the workpiece conveyance operation. As a result, the transferless cycle time becomes longer. In addition, in the existing general transfer device, the feed bar 33 is moved from the intermediate position Q to the lower limit position Q.
Since it is not envisaged that the transfer device will be moved up to , it is necessary to significantly modify the drive section of the transfer device.

On the other hand, although the latter method shown in FIG. 11 has a relatively simple structure, the output shaft 39 comes into contact with the portion that should become the scrap piece SI even before the scrap piece S is trimmed. , there is a risk that the workpiece W may be deformed.

The present invention was made in view of the above problems.
The purpose is to provide a structure in which scrap pieces can be forcibly dropped without causing redundancy in cycle time or deformation of the workpiece as described above.

Means for Solving the Problems The present invention trims the non-product area at the periphery of the workpiece by the shearing action between the upper mold and the lower mold, and removes the scrap generated by the trimming from the scrap attached to the upper and lower molds. This is a transfer type press processing device in which a workpiece that has been divided by a cutter and trimmed is gripped by a gripper attached to a feed bar of a transfer device and transported to the next process. The scrap breaker is characterized in that it is provided with a scrap breaker that rotationally displaces while abutting the scrap in response to the clamping operation of the trimmer, and presses the scrap immediately after trimming downward to cause it to fall.

Effect: According to this structure, the scrap breaker comes into contact with the scrap in response to the clamping operation of the feed bar, whereby the scrap breaker autonomously rotates and displaces. As a result, the scrap is forcibly pushed down, and even if the scrap pieces cut by the scrap cutter are stuck between the scrap cutters, the scrap pieces will fall due to their own weight.

Embodiment FIGS. 2 and 3 are diagrams showing an embodiment of the present invention.
2 indicates a press mold, and 2 indicates a feed bar of a transfer device.

The press die 1 includes a punch 3 serving as a lower die, and an upper holder 4.
a sectional die 7 that is fixed to the upper holder 4 and forms an upper mold 6 together with the pad 5;
It is equipped with A scrap cutter 8.9 is attached to the punch 3 and the sectional die 7, and a scrap chute 10 is attached to the punch 3.

The workpiece W positioned on the punch 3 is pressurized and restrained by the punch 3 and the pad 5, and also has a frame-shaped non-product area at its periphery due to the shearing action of the punch 3 and the sectional die 7. is trimmed as scrap S,
At the same time, the scrap S is cut into the upper and lower scrap cutters 8,
9, it is divided into a plurality of short scrap pieces S I +S, , S3 as shown in FIG.

The feed bar 2 moves three-dimensionally based on the locus shown in FIG. 10, and is attached with an arm 12 in addition to a gripper 11 for conveying the workpiece W. As shown in FIG. 4, a holder 13 is connected to the tip of the arm 12, and a scrap breaker 15 having an angular cross section is rotatably supported by the holder 13 via a shaft 14. The scrap breaker 15 is biased to rotate clockwise in FIG. 3 by a compressed fill spring 16, and normally its position is restricted by a stopper 17 so that its leg 15a is in a vertical position. 18 and 19 are bottles to which the coil spring 16 is fixed.

In the press processing apparatus configured in this way, the second
As shown in the figure and FIG. 3, the non-product area attached to the peripheral edge of the workpiece W is trimmed into a frame shape as scrap S, and at the same time, the scrap S is trimmed into a plurality of frames as shown in FIG. Short scrap pieces S, , S, , S,
However, at this time, as mentioned above, the scrap pieces S may remain caught between the scrap cutters 8 and 8 on the lower die side and may not fall.

In this state, as shown in FIG. 5, when the upper mold 6 rises and the workpiece W is lifted up to the transfer standby position P by a lifter (not shown), the feed bar 2 performs a clamping operation, and the scrap breaker 15 comes into contact with the scrap piece S.

When the feed bar 2 is still displaced toward the clamp limit position, the scrap breaker 15 is rotated counterclockwise about the shaft 14 to push down the scrap piece S1, as shown in FIG. As a result, the scrap pieces S are pulled out from between the scrap cutters 8 and 8, fall under their own weight, and then slide down the scrap chute 10 and are collected by a scrap conveyor (not shown).
(See Figure 6).

When the feed bar 2 is displaced to the clamping limit position, the feed bar 2 continues the clamping operation as shown in FIGS. 6 and 10.
As shown in the figure, an up operation and an advance operation are performed, and the workpiece W that has been trimmed is transported to the next process.

Effects of the Invention As described above, according to the present invention, the feed bar is provided with a scrap breaker that rotationally displaces while contacting the scrap in response to the clamping operation of the feed bar, and presses the scrap immediately after trimming downward to cause it to fall. By this,
Since there is no need to make extra movements in the feed bar, the cycle time can be shortened, and there is no need to modify the drive system of the transfer device, so it can be easily implemented using existing equipment as is.

Further, unlike the conventional fluid spring type breaker, the breaker does not come into contact with the workpiece before trimming is completed, which has the effect of preventing deformation of the workpiece.

[Brief explanation of drawings]

Fig. 1 is a diagram showing one embodiment of the present invention, and is a sectional view taken along the line A-A in Fig. 2, Fig. 2 is a plan view of Fig. 1, and Fig. 3 is a state of the press die immediately after trimming. Figure 4 is an exploded perspective view of the scrap breaker, Figures 5 and 6 are
The figure is a sectional view showing the movement of the feed bar and the scrap breaker, FIG. 7 is a plan view of a conventional press processing device, and FIG. 8 is a plan view showing the state in which scrap is divided.
FIG. 9 is a cross-sectional view taken along the line B-B in FIG. 7, FIG. 10 is an explanatory view showing the motion locus of the feed bar, and FIG. 11 is a cross-sectional view showing another example of the conventional press working device. . 2... Feed bar, 3... Punch (lower die), 6...
- Upper die, 8, 9... Scrap cutter, 11...
Gripper 15... Scrap breaker, S... Scrap, S,... Scrap piece, W... Work. Fig. 1 W (P2) 2--111 foot no. 3--11-point f (lower mold) 6--upper mold 8.9-----S'''7 11--
1--Gree l bar 15--Suitable knife flaker 5-----Screw tube S+----Suitable knife W---Fook Fig. 4 15a Fig. 6 Pl, Figure 9 Figure 7

Claims (1)

[Claims] (1) The non-product area on the periphery of the workpiece is trimmed by the shearing action of the upper and lower dies, and the scrap generated by trimming is divided with the scrap cutter attached to the upper and lower dies, and the trimming is completed. This is a transfer type press processing device in which a workpiece is gripped by a gripper attached to a feed bar of a transfer device and transported to the next process. A transfer type press processing device characterized by being provided with a scrap breaker that rotates and displaces the scrap immediately after trimming to force it downward and drop it.