JP6962954B2 - Work reversing device and work reversing method - Google Patents

Description

The present invention relates to a work reversing device for reversing a work after forging and a method for reversing the work.

Conventionally, a work reversing device for reversing a workpiece after machining for a post-process has been known in a press line.

For example, as in Patent Document 1, a plate-shaped workpiece called a windmill type turnover, which is conveyed by a conveyor, is inserted between a pair of receiving pieces parallel to the rotating body of the reversing device, and the rotating body is placed at 90 °. It is known that the work is rotated and stopped, and the work is directed in the take-out direction at the next 90 ° rotation. By taking out this work on the take-out table, the work is inverted by 180 ° from the initial receiving posture and becomes the taking-out posture.

Japanese Unexamined Patent Publication No. 6-156686 (particularly FIG. 4)

If it is a plate-shaped work as in the above-mentioned conventional technique, it can be stably conveyed even after inversion, so that inversion is easy.

On the other hand, in the case of transporting to a post-process after forging, such as a shaft-shaped member of a universal joint of an automobile, if the forged product is transported so as to roll down on a conveyor, the forged product is easily scratched and there is a problem in terms of quality.

Therefore, there is a need to stably transport the work for the post-process without damaging even the shaft-shaped member.

The present invention has been made in view of this point, and an object of the present invention is to invert a shaft-shaped member after forging so that it can be stably conveyed without being damaged.

In order to achieve the above object, in the present invention, a rotating body having a concave portion matching the shape of the work on the outer peripheral surface is inverted.

Specifically, the first invention presupposes a work reversing device that reverses a forged work having a shaft-shaped base end portion and a cup-shaped tip end portion.

The work reversing device is
A rotating body having a plurality of work insertion recesses on the outer peripheral surface into which the work is inserted from the axial base end.
A holding mechanism that presses and holds the work inserted in the work insertion recess and releases the work in an inverted state.
It is provided with a conveyor that conveys the inverted work with the cup-shaped tip portion facing down.

According to the above configuration, since the work insertion recess is provided on the outer peripheral surface of the rotating body itself, it can be arranged in a narrow space as compared with the case where a rotatable arm having a certain length is provided. Therefore, the work can be reliably and easily inverted so that the cup-shaped tip is on the bottom and transferred to the conveyor. Further, in the case of an arm, since the movement of grasping and releasing the work is repeated, it is necessary to move back and forth, but according to the above configuration, the work can be accommodated, held, and released by moving the rotating body in only one direction. It can be repeated and the cycle time is shortened. Therefore, it is possible to stably convey the work without damaging the work with a simple structure.

In the second invention, in the first invention,
The work insertion recess of the rotating body is configured so that the transfer device of the forging press machine can be arranged at a position where the forged work is released with the shaft-shaped base end portion facing down.

According to the above configuration, the work after pressing can be inserted into the work insertion recess by utilizing the process in which the transfer device conveys the work. Therefore, the work can be carried out while the forging press machine is driven, so that the work can be handled efficiently.

In the third invention, in the first or second invention,
The holding mechanism is reduced when the rotating body is in the position where the work is inserted, is stretched after the insertion to hold the work, and when the rotating body is in the position where the work is released. Equipped with a cylinder that is reduced again.

According to the above configuration, the work can be inserted, held and released with a simple configuration provided with a cylinder.

In the fourth invention, in any one of the first to third inventions,
The holding mechanism includes a shutter member that opens when the rotating body is in a position where the work is inserted, closes after insertion, and reopens when the rotating body is in a position where the work is released.

According to the above configuration, the work can be inserted, held and released with a simple configuration provided with a shutter member.

The fifth invention targets a method of reversing a work that reverses a forged work having a shaft-shaped base end portion and a cup-shaped tip end portion.
The method of reversing the above work is
A rotating body having a plurality of work insertion recesses on the outer peripheral surface into which the work is inserted from the axial base end.
A holding mechanism that presses and holds the work inserted in the work insertion recess and releases the work in an inverted state.
A work reversing device equipped with a conveyor for transporting the inverted work with the cup-shaped tip portion facing down is prepared.
The transfer device of the forging press machine releases the forged work above the work insertion recess with the shaft-shaped base end facing down.
The work is held by the holding mechanism,
After rotating the rotating body 180 °,
Release the work with the holding mechanism and
The work placed on the transfer conveyor is transported to a subsequent process by the transfer conveyor.

According to the above configuration, after the cup-shaped tip is pressed by a forging press machine, the transfer device can be used to carry the cup-shaped tip down on a conveyor, which damages the work. It can be transported stably without any need.

As described above, according to the present invention, the shaft-shaped member after forging can be inverted and stably conveyed without being damaged.

It is a front view which shows the outline of the work reversing apparatus which concerns on embodiment of this invention. FIG. 2 is a cross-sectional view taken along the line II-II of FIG. It is a front view which shows a part of a forging press and a transfer apparatus, and a work reversing apparatus. It is a top view which shows a part of a forging press and a transfer apparatus, and a work reversing apparatus. It is a front view which shows the outline of the rotating body and the holding mechanism which concerns on the modification of embodiment in an enlarged manner.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

1 to 4 show a work reversing device 1 according to an embodiment of the present invention, which is provided on a forging press machine 60 to reverse a forged work 50. The forging press machine 60 in the present embodiment includes a lower die 61 and an upper die 62 for forging the work 50, and further includes a transfer device 63 for handling the work 50. The work reversing device 1 is arranged in the frame 64 of the forging press machine 60.

As shown in FIG. 1, the work 50 is, for example, a component of a universal joint connected to the shaft of a continuously variable transmission, and is more than a round bar-shaped shaft-shaped base end portion 51 and the shaft-shaped base end portion 51. It has a cup-shaped tip 52 having a large outer diameter and a recess that opens upward. Since the outer diameter of the cup-shaped tip 52 of the work 50 is larger than the outer diameter of the shaft-shaped base end 51, it is preferable to put the cup-shaped tip 52 down when transporting the work 50 upright. On the other hand, the cup-shaped tip 52 is pressed by the lower die 61 and the upper die 62 by the forging press 60 to be processed. For example, in this work 50, the outer diameter of the cup-shaped tip portion 52 is about 100 mm, and the total length is about 200 mm.

The work reversing device 1 includes a rotating body 2 having a plurality of work insertion recesses 3 into which the work 50 is inserted from the shaft-shaped base end portion 51. The rotating body 2 is controlled by a control device 7 equipped with a CPU or the like so as to rotate half a turn in, for example, an electric motor 4 in 2 to 3 seconds. The control device 7 also controls the entire forging press machine 60.

The work insertion recess 3 has a circular cross section, has a portion on the back side where the shaft-shaped base end portion 51 of the work 50 is inserted, and has a cross-sectional circle on the outer peripheral surface side that is approximately the same as the outer diameter of the cup-shaped tip portion 52. It has a recess in shape. In the present embodiment, one rotating body 2 is provided with two work insertion recesses 3, but the number may be one or three or more. The work insertion recess 3 of the rotating body 2 is configured so that the transfer device 63 of the forging press machine 60 can be arranged directly below the position where the forged work 50 is released with the shaft-shaped base end portion 51 facing down. ing.

The work reversing device 1 further presses and holds the work 50 inserted in the work insertion recess 3, the rotating body 2 is rotated, and the work 50 is released in a state where the work 50 is turned downward. The holding mechanism 5 is provided.

The holding mechanism 5 is, for example, a position where the rotating body 2 is reduced when the work 50 is inserted, is expanded after the work 50 is inserted, and holds the work 50, and the rotating body 2 is at a position where the work 50 is released. It is equipped with a hydraulic cylinder 5a that is reduced again when it is in. As a result, the work 50 can be inserted, held, and released with a simple configuration. The holding mechanism 5 holds the work 50 when the hydraulic cylinder 5a is extended and pushed, and when the hydraulic cylinder 5a contracts and separates, the work 50 is pushed back by an urging member 5c made of a compression coil spring or the like. The pressing member 5b is provided. The hydraulic cylinder 5a may be composed of a pneumatic cylinder and an electric cylinder.

Further, the work reversing device 1 includes a conveyor 6 that conveys the inverted work 50 with the cup-shaped tip portion 52 facing down. The transfer conveyor 6 has a transfer device 6a made of a stainless steel plate or the like, and can transfer even a high-temperature work 50 after forging. On the other hand, since the surface is hard, the work 50 may be damaged if the work 50 is not placed carefully. Therefore, the position of the transport device 6a is provided at a position where the minimum height at which the released work 50 can be transported without contacting the rotating body 2 is secured.

Next, a method of reversing the work 50 according to the present embodiment will be described.

First, the work reversing device 1 described above is prepared. As described above, the work reversing device 1 is placed on the upper side just below the position where the transfer device 63 of the forging press machine 60 releases the forged work 50 with the axial base end portion 51 facing down. Arrange so that the insertion recess 3 comes.

Hereinafter, the control device 7 controls the whole. The transfer device 63 of the forging press machine 60 repeats gripping and releasing while shifting the work 50 to the right side by one pitch in FIG. 3 each time the press operation is performed.

After the forging is completed, the transfer device 63 releases the work 50 above the work insertion recess 3 with the shaft-shaped base end portion 51 facing down. Then, the work 50 is inserted into the work insertion recess 3 of the rotating body 2. As described above, in the present embodiment, the work 50 after pressing can be easily inserted into the work insertion recess 3 by utilizing the step in which the transfer device 63 conveys the work 50. Therefore, the work 50 can be handled efficiently.

Next, the holding mechanism 5 is operated to hold the work 50. In the present embodiment, the hydraulic cylinder 5a is extended and the work 50 is pressed and held by the pressing member 5b.

Next, the electric motor 4 is driven to rotate the rotating body 2 by 180 °. Then, the work 50 is in a state where the cup-shaped tip portion 52 is turned down.

Next, the holding mechanism 5 releases the work 50. Specifically, the hydraulic cylinder 5a is shortened, the work 50 pressed and held by the pressing member 5b is dropped, and the work 50 is placed on the transport device 6a. At this time, since the position of the transfer device 6a is set to a position where the released work 50 has a minimum height that can be conveyed without contacting the rotating body 2, the cup-shaped tip portion 52 is damaged by the impact of dropping. Is hard to stick.

Next, the work 50 placed on the transfer conveyor 6 is transferred to the subsequent process by the transfer conveyor 6. In the post-process, for example, bondage treatment (lubricating oil treatment), sizing, and the like are performed.

As described above, in the present embodiment, after the cup-shaped tip 52 is pressed by the forging press machine 60, the cup-shaped tip 52 suitable for transport is transferred by the transfer conveyor 6 by using the transfer device 63. Therefore, the work 50 can be stably conveyed without being damaged.

Further, in the present embodiment, since the work insertion recess 3 is provided on the outer periphery of the rotating body 2 itself, it can be arranged in a narrow space.

Further, when the work is conveyed by the arm, the work is repeatedly grabbed and released, so that it is necessary to go back and forth. However, in the present embodiment, the work 50 can be accommodated by moving the rotating body 2 in only one direction. , Holding and releasing can be repeated, and the cycle time is shortened.

Therefore, according to the work reversing device 1 according to the present embodiment, the forged work 50 can be reversed and stably conveyed without being damaged.

-Modification example-
FIG. 5 shows a modified example of the embodiment of the present invention, which is different from the above embodiment in that the configuration of the holding mechanism 105 is different. In each of the following modifications, the same parts as those in FIGS. 1 to 4 are designated by the same reference numerals, and detailed description thereof will be omitted.

In the work reversing device 101 according to the present modification, the holding mechanism 105 opens at the position where the work 50 is inserted, closes after the work 50 is inserted, and the rotating body 2 is at a position where the work 50 is released. It is provided with a shutter member 105a that reopens at. The shutter member 105a is driven by a hydraulic cylinder 5a, a pneumatic cylinder, and an electric cylinder controlled by the control device 7, as in the above embodiment.

Also in this modified example, the work 50 can be inserted, held, and released with a simple configuration.

Since it is necessary to close the cup-shaped tip portion 52 of the work 50 from the outside in the radial direction with the shutter member 105a, it is necessary to make the work insertion recess 103 larger, and the outer diameter of the rotating body 102 is larger than that of the above embodiment. It's getting bigger.

(Other embodiments)
The present invention may have the following configuration with respect to the above embodiment.

That is, in the above embodiment, the work 50 is a component of the universal joint, but the work is not limited to this, and in essence, any work after forging having a shaft-shaped base end portion and a cup-shaped tip end portion may be used.

It should be noted that the above embodiments are essentially preferable examples, and are not intended to limit the scope of the present invention, its applications and applications.

1 Work reversing device
2 rotating body
3 Work insertion recess
4 Electric motor
5 Holding mechanism
5a Hydraulic cylinder (cylinder)
5b Pressing member
5c urging member
6 Conveyor conveyor
6a Conveyor device
50 works (shaft member)
51 Axial base end
52 Cup-shaped tip
60 Forging press
60 Forging press machine
61 Lower mold
62 Upper mold
63 Transfer device
64 frames
101 Work reversing device
102 rotating body
103 Work insertion recess 105 Holding mechanism
105a Shutter member

Claims (5)

In a work reversing device that reverses a forged work having a shaft-shaped base end and a cup-shaped tip.
A rotating body having a plurality of work insertion recesses on the outer peripheral surface into which the work is inserted from the axial base end.
A holding mechanism that presses and holds the work inserted in the work insertion recess and releases the work in an inverted state.
A work reversing device including a conveyor that conveys the inverted work with the cup-shaped tip portion facing down. In the work reversing device according to claim 1,
The work insertion recess of the rotating body is characterized in that the transfer device of the forging press machine can be arranged at a position where the forged work is released with the shaft-shaped base end portion facing down. Work reversing device. In the work reversing device according to claim 1 or 2.
The holding mechanism is reduced when the rotating body is in the position where the work is inserted, is stretched after the insertion to hold the work, and when the rotating body is in the position where the work is released. A work reversing device comprising a cylinder that is reduced again. In the work reversing device according to any one of claims 1 to 3.
The holding mechanism includes a shutter member that opens when the rotating body is in a position where the work is inserted, closes after insertion, and reopens when the rotating body is in a position where the work is released. A work reversing device characterized by. In the method of reversing a workpiece having a shaft-shaped base end portion and a cup-shaped tip portion and reversing a workpiece after forging.
A rotating body having a plurality of work insertion recesses on the outer peripheral surface into which the work is inserted from the axial base end.
A holding mechanism that presses and holds the work inserted in the work insertion recess and releases the work in an inverted state.
A work reversing device equipped with a conveyor for transporting the inverted work with the cup-shaped tip portion facing down is prepared.
The transfer device of the forging press machine releases the forged work above the work insertion recess with the shaft-shaped base end facing down.
The work is held by the holding mechanism,
After rotating the rotating body 180 °,
Release the work with the holding mechanism and
A method of reversing a work, which comprises transporting the work placed on the transport conveyor to a subsequent process by the transport conveyor.

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