JPH0242288B2 - - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) This invention is a press line installed to press a workpiece in multiple press processes, and a press line for automatically discharging scraps generated during the press process. Relating to a scrap discharge device.

(Prior Art) Conventionally, scraps generated during press processing have been discharged from a press machine, for example, within a mold of the press machine or by a discharge mechanism built into the press machine.

[Problems to be Solved by the Invention] When scraps generated during press processing are discharged by a discharge mechanism built into a press machine or a mold of a press machine, it is necessary to discharge scraps generated by press processing by a discharge mechanism built into a press machine or a mold of a press machine. There are also problems in which the ejecting operation is complicated due to constraints, and the ejecting mechanism cannot respond to differences in the shape of the scrap when changing the shape of the workpiece.
The press working cycle time is the sum of the processing time for press working and the time required for scrap discharge, so the press working cycle time is extended and the press working process becomes inefficient. And so on.

The present invention aims to solve the above problems.

[Means for Solving the Problems] The scrap discharging device of the present invention has a workpiece pedestal on which pressed workpieces and scraps are transferred, and the scrap discharging device of the present invention has a workpiece pedestal on which pressed workpieces and scraps are transferred, and the scrapfeeding device has a workpiece pedestal on which pressed workpieces and scraps are transferred. In order to position and place a workpiece, a workpiece mounting section formed at the upper end of the platform is moved up and down by the descending movement of the platform. A plurality of latching claws are installed on the workpiece pedestal so as to be displaced to a lower position, and are supported on the workpiece pedestal so as to be able to advance onto the scrap and retreat from the top of the scrap in order to prevent the upward movement of the scrap. are installed at a distance apart from each other to allow the passage of scrap, and furthermore, on one side of the lifting table, there is a horizontally moving and retracting mechanism for pushing out and discharging the scrap from above the workpiece pedestal after carrying out the workpiece. It is equipped with a dynamically controlled scrap kicker.

[Operation] When transferring the pressed workpiece together with the scrap onto the workpiece pedestal of the intermediate table,
The workpiece is positioned and placed on the workpiece resting section that has been moved to the intermediate position, and the workpiece is lifted to a position above the workpiece pedestal by the workpiece resting section that has been moved to the raised position, and the workpiece and the scrap are separated. When loading the scrap, the upward movement of the scrap is prevented by multiple latching claws installed at intervals on the work holder, and when the scrap is discharged after the work is carried out,
When the workpiece placement section is retracted to a position below the workpiece pedestal, the scrap pusher is moved forward to push the scrap in the horizontal direction, thereby separating the space between the workpiece pedestal and each of the above-mentioned latching claws. The workpiece is passed through and pushed out of the workpiece pedestal.

(Example) Next, an example of the present invention will be described with reference to the drawings.

In a press line where a plurality of press stations are arranged, the intermediate table 1 includes a press station for trimming the peripheral edge of a workpiece, and a press station for performing a predetermined press process on the workpiece from which the peripheral edge has been removed. It is installed at the tip of a mounting bracket 3 installed horizontally to the press surface plate 2 of the press station.

The machine frame 4 of the intermediate table 1 has a rectangular plate-shaped workpiece pedestal 5 placed horizontally on its upper end, and this workpiece pedestal 5.
A rectangular plate-shaped mounting plate 6 is arranged below and attached to the upper surface of the mounting bracket 2, and a mounting plate 6 is installed vertically between each corner of the workpiece pedestal 5 and the mounting plate 6.
It is formed by assembling two pillars 7, and is supported in a cantilever manner with respect to the press surface plate 2 via the mounting bracket 3.

Then, the workpiece W that has been trimmed in the previous process and transferred from the previous process is transferred onto the workpiece pedestal 5 together with the scrap S generated in the trimming process.

The vertically elongated support fitting 8 passes through the mounting plate 6 and is attached to the side surface of the tip of the mounting fitting 3. A rectangular trapezoidal guide piece 8a is protruded from the inner surface of the upper end of the support fitting 8, and the upper end A substantially cylindrical stopper 8b is protruded from one side of the vicinity.

The first lifting cylinder 9 is supported perpendicularly to the lower end of the support fitting 8, and a second lifting cylinder 10 is connected to the piston shaft 9a of the first lifting cylinder 9, so that both lifting cylinders 9 and 10 are arranged vertically in series. It is connected to.

The lower end of the connecting fitting 11 is connected to the second lifting cylinder 1
It is connected to the piston shaft 10a of 0 and plunged into the machine frame 4, and the guide piece 8 of the support fitting 8 is attached to one side of the machine frame 4.
A guide groove 11a is formed in a vertical shape to engage with the guide groove 11a and guide the vertical movement of the connecting fitting 11.

A lifting platform 12 attached to the upper end of the connecting fitting 11 is installed horizontally within the machine frame 4 so as to be movable up and down.
An elevating table 13 whose longitudinal section is formed into a substantially mold-like shape is attached to the center of the upper surface, and a workpiece mounting plate is installed at the upper end of the elevating table 13 to fit into the forming part of the workpiece W and place the workpiece W thereon. The placing portion 14 is formed in a convex shape.

The set bolt 15, which is fastened vertically to the lifting plate 12 and hangs down parallel to the upper end of the support fitting 8, is loosely inserted into the stopper 8b of the support fitting 8.
An upper lock nut 16 for defining the lowering ends of the lifting plate 12 and the lifting table 13 is screwed onto the upper part of the lock nut 16 so that the upper lock nut 16 can be adjusted. A lower locking nut 17 for defining is screwed on so as to be adjustable. Then, when the piston shaft 9a of the first elevating cylinder 9 and the piston shaft 10a of the second elevating cylinder 10 are retracted and the upper lockite 16 is in contact with the stopper 8b of the support fitting 8, the elevating plate 12 and the elevating platform 13 is held at the lower end, and the base end surface 14a of the workpiece mounting section 14 is held at the lower end.
When the piston shaft 10a of the second elevating cylinder 10 is moved to the lower end position h0 in this state and the piston shaft 10a of the second elevating cylinder 10 is advanced to the advancing end, the base end surface 14a of the mounting portion 4 is moved to the lower end position h0.
is displaced to an intermediate position h1 that substantially coincides with the upper surface 5a of the workpiece pedestal 5, and in this state, the workpiece W is positioned and transferred onto the workpiece pedestal 5 and the workpiece mounting section 14. Further, when the piston shaft 9a of the first lifting cylinder 9 is moved in this state, the lifting table 13 moves upward until the lower lock nut 17 comes into contact with the stopper 8b and is displaced to the rising end, and the workpiece mounting section 14 is moved upward. The base end portion 14a is displaced to the rising end position h2 above the workpiece pedestal 5, and the workpiece W is lifted by the workpiece mounting portion 14, leaving the scrap S behind.

The scrap S transferred to the work pedestal 5 along with the work W is allowed to move horizontally.
A pair of front and rear latching claws 18, 18 are installed near the front and rear ends of the workpiece pedestal 5 with a space between them for allowing the scrap S to pass through, in order to prevent upward movement of the workpiece pedestal 5. a racket 22 attached to the top surface;
22 so as to be able to advance onto the scrap S and retreat from the top of the scrap S, and are always urged inward by a spring (not shown).
When the scrap S is pushed down from above both latching claws 18 and transferred onto the workpiece pedestal 5, both latching claws 18
are each pressed by the scrap S and swung outward, and both ends S1, S1 of the scrap S are placed on the workpiece pedestal 5 over the respective latching claws 18, and the workpiece pedestal 5 and both latches are placed on the workpiece pedestal 5. They are inserted between the retaining claws 18 and the retaining claws 18, respectively. Then, the piston shaft 9a of the first lifting cylinder 9 retracts, and the second lifting cylinder 1
The piston shaft 10a of 0 moves forward and the workpiece placement part 1
4 is displaced to the intermediate position h1, and the workpiece W and scrap S are transferred onto the workpiece pedestal 5, the piston shaft 9a of the first lifting cylinder 9 is moved to move the lifting table 13. When the base end 14a of the workpiece placement part 14 is moved to the rising end position h2, the workpiece W is lifted up and placed inside the scrap S with the scrap S being held by both of the latching claws 18. The lifted workpiece W is sucked by a robot (not shown) and carried out to the next process.

A discharge cylinder 19 installed horizontally on one side of the workpiece pedestal 5 is attached to the cylinder mounting plate 2 on the machine frame 4.
It is attached via 0.

The scrap picker 21, whose flat surface is formed into a substantially molded shape, is transferred onto the workpiece pedestal 5 and pushes the scrap S held by both latching claws 18 in the left-right direction after carrying out the workpiece W. It is attached to the piston shaft 19a of the ejection cylinder 19 in order to discharge the workpiece from above the workpiece pedestal 5, and near the tips of both sides thereof there are pushing parts 21a that are bent upward and protrude from the upper surface of the workpiece pedestal 5, respectively. 21a are formed respectively. After carrying out the workpiece W leaving the scrap S on the workpiece pedestal 5, the piston shafts 9a and 10a of the first and second lifting cylinders 9 and 10 are simultaneously retracted to return the lifting table 13 to the lowering end. When the discharging cylinder 19 is moved forward and backward with the base end surface 14a of the workpiece placement section 14 displaced to the lower end position h0, the scrap picker 21 moves forward and removes the scraps remaining on the workpiece pedestal 5. After pushing the scrap S out of the workpiece pedestal 5, it returns to its original position, and the scrap S can be discharged from the workpiece pedestal 5.

Next, the operation and effects of the embodiment having the above configuration will be explained.

This example has a workpiece pedestal 5 on which pressed workpieces W and scraps S are transferred, and an intermediate table 1 installed in the press line is placed in a machine frame 4 that is controlled to rise and fall in three stages. The work placement part 14 formed at the upper end of the lift table 13 for positioning and placing the workpiece W is placed at a position above the workpiece pedestal 5 and at an intermediate position facing the workpiece pedestal 5. and the lower position of the workpiece pedestal 5, so as to be displaced by the lifting and lowering movement of the lifting table 13, and on the workpiece pedestal 5, in order to prevent the scrap S from moving upward, A plurality of latching claws 18 supported so as to be retractable from above the scrap,
They are installed at a distance 〓 to allow the passage of the scrap S, and furthermore, on one side of the lifting platform 13, after the workpiece W is carried out, a horizontal direction is provided to push out the scrap S from above the workpiece pedestal 5 and discharge it. A scrap kicker 21 whose forward and backward movement is controlled is installed.

Therefore, the loading operation of the workpiece W, the separation operation of the workpiece W and the scrap S, the unloading operation of the workpiece, and the operation of discharging the scrap S can be carried out quickly and accurately at the correct timing. This has the effect of efficiently discharging scraps in a press line by smoothly discharging scraps without interfering with the conveyance operation of the workpiece.

In particular, the scrap ejector should be installed on the intermediate table 1.
Since the scrap ejecting device is incorporated into the press machine, the ejecting function can be simplified and the ejecting operation can be simplified, and press working and scrap ejecting can be performed at the same time. The scrap discharge time that occupies the cycle time can be eliminated, which has the effect of streamlining the press processing process in the press line and increasing the productivity of the press line.

Further, since the workpiece W and the scrap S are carried onto the workpiece pedestal 5 of the intermediate table 1 and once transferred to a fixed position, the scrap S is discharged, so that the operation of discharging the scrap S can be stabilized and smoothed. , even if the shapes of the workpieces W are significantly different, each scrap S can always be accurately discharged.

Furthermore, since the scrap S on the workpiece pedestal 5 is actively pushed out and discharged by the scrap picker 21, the scrap discharge operation can be speeded up and stabilized, and the time required for scrap discharge is This has the effect of stably performing the transport operation of transferring the work on the intermediate table 1 by keeping it constant.

[Effects of the Invention] Since the present invention is configured as described above, the loading operation of the work, the separating operation of the work and scrap, the unloading operation of the work, and the operation of discharging the scrap can be performed at accurate timing. Scraps can be moved forward quickly, and scraps can be smoothly discharged without interfering with workpiece conveyance in the press line, thereby making the scrap discharge operation in the press line more efficient.

In particular, since the scrap discharging device is built into the intermediate table, the unloading mechanism can be simplified and the discharging operation can be simplified, and since pressing and scrap discharging can be performed simultaneously, the scrap discharging device can be integrated into the press machine. When incorporated, it is possible to eliminate the scrap discharge time that occupies the cycle time of press working, which has the effect of streamlining the press working process in the press line and increasing productivity.

In addition, since the workpiece and scraps are carried onto the workpiece pedestal of the intermediate table and transferred to a fixed position before the scraps are discharged, the scrap discharge operation can be stabilized and smoothed.
Even if the shapes of the workpieces are significantly different, each scrap can be ejected accurately at all times.

Furthermore, since the scrap on the workpiece pedestal is actively pushed out and discharged by the scrap picker, the scrap discharge operation can be speeded up and stabilized, and the processing time for scrap discharge can be made constant. This has the effect of stably performing the transport operation of transferring the work on the intermediate table.

[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a side view of the intermediate table, FIG. 2 is a front view, and FIG. 3 is a plan view. 1... Intermediate table, 5... Work pedestal, 18
...Latching claw, 21... Scrap-puncher, S...
... Scrap, W... Work.

Claims (1)

[Claims] 1. It has a workpiece pedestal on which pressed workpieces and scraps are transferred, and a lifting platform that is controlled to move up and down in multiple stages is installed in the machine frame of the intermediate table installed in the press line. installed so that a workpiece mounting portion formed at the upper end of the lifting table is displaced to a position below the workpiece pedestal by the lowering operation of the lifting table, in order to position and place the workpiece;
A plurality of latching claws supported so as to be able to advance onto the scrap and retract from the top of the scrap to prevent upward movement of the scrap are mounted on the workpiece pedestal, and are spaced apart by a distance to allow passage of the scrap. Furthermore, a scrap picker was installed on one side of the lifting table, and the scrap picker was controlled to move horizontally in a horizontal direction in order to push out and discharge the scraps from above the work pedestal after the work was carried out. A scrap discharge device in a press line, characterized by: