JPH06195Y2 - Single drive for forging press machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to an independent drive device for a forging press machine.

In a forging press machine including at least a transfer device having a clamp / unclamping cam and an advance / return cam, and a knockout cam for moving a knockout pin up and down, independent operation of the transfer device and the knockout pin and their operation It can be used for timing adjustment.

[Prior Art] In a press machine equipped with a transfer device and a knockout pin, cams that determine the timing of the transfer operation, such as a clamp / unclamp cam, a lift down cam, and an advance / return cam, or a knockout operation. The knockout cams that determine the timing of are mounted directly on the crankshafts.

Therefore, in the past, when setting the mold and fingers, the transfer device and knockout pin were operated while actually rotating the crankshaft, and the timing of knockout operation of these transfer device and knockout pin was adjusted. Was there.

[Problems to be Solved by the Invention] If the transfer operation, the knockout operation, and their timings are adjusted while rotating the crankshaft as in the past, the slide will move up and down, which is not only dangerous but also the slide. It was not efficient because these movements were difficult to see due to the vertical movement of the.

On the other hand, when it is necessary to change the timing of knockout operation by exchanging molds, it is necessary to shift the phase of the knockout cam and crankshaft, which is extremely difficult due to the structure of conventional knockout devices. It was. Here, in order to specifically explain the difficulty of changing the timing, a general structure of a conventional knockout device will be described with reference to FIG.

In the figure, a knockout cam 11 is a crankshaft 1
0 is integrally fitted with a key 27, and the cam follower 5 is provided on one end side of a lever 6 which is rotatable on a support shaft 7.
Further, one end of a knockout rod 15 is connected to the other end of the lever 6 via a pin 8.

The knockout rod 15 is for driving the knockout pin 18, and the other end of the knockout rod 15 has a support shaft 19 through the pin.
It is attached to a freely rotatable lever 16. The lever 17 that directly drives the knockout pin 18 is
Similarly, the support shaft 19 is attached.

It should be noted that the cylinder device formed by the cylinder 116 having the base end attached to the machine body and the piston 117 integrally provided with the piston rod 118 has a knockout pin 18
Lifter and cam follower 5 for raising
To prevent the jump by engaging the cam 11 with the cam 11. For this purpose the piston rod 11
8 is pivotally supported by the lever 16 via a pin 119.

In such a knockout device, the knockout pin 18 moves in the mold (lower mold in this example) with a motion stroke based on the shape of the cam 11 as the crankshaft 10 rotates, and knocks out the molded product. .

Thus, in the above-mentioned conventional device, the knockout cam 1
Since 1 and the crankshaft 10 are integrally connected by the key 27, it is extremely difficult to change the timing by arranging the phases in the rotational direction between the both 10 and 11.

Therefore, it is possible to prepare a plurality of cams and replace them each time to change the apparent timing. However, even if this is done, it takes a lot of time and effort to exchange it, and it is inefficient. Also, it is economically disadvantageous and is not a drastic measure.

Moreover, even if the timing of the knockout operation is changed, the timing of the transfer operation must be changed so as to be synchronized with the timing of the knockout operation. Usually, the timing of transfer of the transfer device in the press machine is determined by the knockout motion on the bet side. That is, it is important that the product clamp position is the upper limit of knockout. Therefore, when the timing of the knockout operation is changed, the timing of the transfer operation must be changed so as to synchronize with the timing.

This is more troublesome because the phases of the clamp / unclamp cam, lift-down cam, advance-return cam, and crankshaft must be adjusted individually, like the knock-out cam.

Here, the object of the present invention is to solve such a conventional problem, and to independently drive the transfer device and the knockout pin without rotating the crankshaft, and to improve the timing and knockout operation of these transfer devices. It is an object of the present invention to provide an independent drive device for a forging press machine capable of efficiently and easily adjusting the timing.

[Means for Solving the Problem] In the present invention, a crankshaft is provided separately from a crankshaft, and a cam for driving a knockout pin and a cam for driving a transfer device are attached to the crankshaft. By disconnecting the rotating body and rotating the rotating body without rotating the crankshaft in this state, the transfer device and the knockout pin can be independently driven, so that the fingers of the transfer device can be set safely and securely. It was formed. At this time, if the rotating body is moved in the axial direction and separated from the crankshaft, the knockout cam and the cam follower move relative to each other in the axial direction, and the wall thickness of the cam, etc. is increased by an amount corresponding to this moving amount. There are problems such as having to do so. Therefore, instead of the rotating body, the moving body is moved in the axial direction so that the crankshaft and the rotating body are coupled and separated via the connecting means.

That is, for forging equipped with at least a transfer device that performs a clamp / unclamp operation by a clamp / unclamp cam and an advance / return operation by an advance / return cam, and a knockout cam that moves the knockout pin up and down. In a press machine, the clamp / unclamp cam, advance / return cam, and knockout cam mounted on the machine body coaxially with the crankshaft so as to be rotatable and axially movable are mounted in a predetermined positional relationship. A moving body, a moving body axially movably mounted in the hollow portion of the rotating body, a moving means for moving the moving body, and a moving means for moving the moving body to the crankshaft side. When the crankshaft and the rotating body are connected so as to be synchronously rotatable, Particularly, when the moving body is moved to the side opposite to the crankshaft, a connecting means that relatively rotatably separates the crankshaft and the rotating body, and the moving means separates the moving body from the crankshaft. Rotation driving means for rotating the rotating body in a state of being moved to the opposite side.

[Operation] When the moving means moves the moving body to the side opposite to the crankshaft, the connecting means separates the crankshaft and the rotating body into a relatively rotatable state. When the rotating body is rotated by the rotation driving means in this state, the transfer device is driven by the clamp / unclamping cam and the advance / return cam attached to the rotating body, and the knockout pin moves up and down by the knockout cam. Be moved. Therefore, the transfer device and the knockout pin can be independently driven without rotating the crankshaft. Therefore, it is possible to safely confirm the operating status of the fingers and the like of the transfer device. On the other hand, when changing the ascending / descending speed of the slide or the like, the timings of the knockout operation and the transfer operation can be adjusted at the same time simply by changing the phases of the crankshaft and the rotating body. Therefore, these timing adjustments can be performed efficiently and easily.

In this way, the timing of the transfer operation and the knockout operation is adjusted without rotating the crankshaft, and then the moving body is moved to the crankshaft side by the moving means. Are connected so that they can rotate synchronously. Therefore, thereafter, the press machine can be operated in this state.

By moving the moving body in the axial direction instead of the rotating body, the crankshaft and the rotating body are coupled and separated via the connecting means. Therefore, the knockout cam and the cam follower cannot move in the axial direction. There is no need to increase the wall thickness of both. Therefore, the space in the device can be saved and the difficulty of processing can be eliminated.

[Embodiment] A preferred embodiment of the present invention will be described below with reference to the drawings.

(First Embodiment) FIGS. 1 to 3 show an independent drive device of the present embodiment. The independent drive device is roughly divided into a knockout cam 11
Knockout device, including clamp / unclamp cam 12, lift-down cam 13 and advance
A transfer device including a return cam 14 and the like, a rotating body 20 arranged coaxially with the crankshaft 10, a moving body 30 mounted in a hollow portion 22 of the rotating body 20 so as to be axially movable, and It comprises a moving means 35 for moving the moving body 30 in the axial direction, a connecting means 40 for connecting and disconnecting the crankshaft 10 and the rotating body 20, and a rotation driving means 55 for rotating the rotating body 20. There is.

It should be noted that the power transmission system and the operating mechanism of the transfer device and the knockout device in the present embodiment can be known ones, and therefore the drive relationship thereof will be mainly described here.

Here, the crankshaft 10 is rotatably supported by a frame forming a crown, as shown in FIG. Further, at one end of the crankshaft 10, a rotating body 20 is provided coaxially with the crankshaft 10 so as to be rotatable and non-displaceable in the axial direction (arrow P and Q directions).

As shown in FIG. 1, the rotating body 20 can drive the transfer device and the knockout pin independently without rotating the crankshaft 10, the crankshaft 10, the knockout cam 11, the clamp / unclamp cam. 12, lift down cam 13, advance
These cams 11, 12 and 1 are provided in order to separate the return cam 14 from each other and to enable relative rotation.
3.14 is mounted with a key 27 or the like in a predetermined positional relationship. Here, the cams of the transfer device, that is, the clamp / unclamp cam 12, the lift-down cam 13, and the advance / return cam 14 are provided with a predetermined clamp / feed clamp on a feed bar or the like via a cam follower, a lever, or a rod, respectively. It is formed to perform an unclamp operation, a lift down operation, and an advance / return operation (feed bar and the like are not shown). A hollow portion 22 is formed through the rotary body 20 in the direction of its central axis. The hollow portion 22 includes a small diameter portion 23, a hollow portion 24, a boss accommodating portion 25, and a large diameter portion 28.

By the way, as a measure for separating the rotating body 20 from the crankshaft 10 and allowing relative rotation, it is conceivable to move the rotating body 20 in the axial direction (arrow P, Q direction) to separate it from the crankshaft 10. . However, in the case of such a configuration, the knockout cam 11 and the cam follower 5 relatively move in the axial direction. Here, in order to transmit a sufficient knockout driving force from the cam 11 to the cam follower 5, it is necessary that the cam 11 and the cam follower 5 are in abutting engagement with a certain width or more. Therefore, the cam 11 and the cam follower 5 need to be made thicker according to the amount of relative movement, but in order to realize smooth relative movement, the outer peripheral surfaces of the cam 11 and the cam follower 5 that abut and engage with each other. Must be surface-finished with extremely high precision, which makes machining difficult. Further, since the cam 11 inevitably becomes large, a large amount of power is required to move the rotating body 20 equipped with such a large cam 11, and the device becomes large and complicated.

Therefore, in order to eliminate such an inconvenience, the present invention moves the moving body 30 in the axial direction instead of moving the rotating body 20 in the axial direction, so that the crankshaft 10 and the rotating body are connected via the connecting means 40. It is configured to be coupled and separated from 20. Therefore, the knockout cam 11 and the cam follower 5 do not move relative to each other in the axial direction.
The wall thicknesses of 1 and the cam follower 5 are set to the minimum within a range in which a sufficient knockout driving force can be transmitted.

By the way, the moving body 30 is attached to the hollow portion 22 of the rotating body 20 so as to be movable in the axial direction (arrow P and Q directions).
Here, the movable body 30, which is a movable part, is made as small and lightweight as possible while maintaining a certain strength. The outer diameter of the moving body 30 is formed to be slightly smaller than the small diameter portion 23 of the rotating body 20 so that the moving body 30 can smoothly move in the axial direction. An oil passage (not shown) is extended from the crankshaft 10 in the moving body 30, and lubricating oil is supplied to each part of the rotating body 20 and the like. Further, a disk 32 is attached to the right end portion of the moving body 30 in the figure, and a switching detector 65 is installed at a position separated from the disk 32 to the right by a predetermined distance.

The switching detector 65 is turned off when the moving body 30 is moved in the arrow P direction and the crankshaft 10 and the rotating body 20 are coupled via the connecting means 40, and the moving body 30 is moved in the arrow Q direction. When the crankshaft 10 and the rotating body 20 are separated from each other, the ON state is formed. Therefore, the coupling / separation of the crankshaft 10 and the rotating body 20 can be detected by the detector 65.

The moving means 35 includes a spring 36 for urging the moving body 30 toward the crankshaft 10 and a hydraulic mechanism for moving the moving body 30 to the opposite side of the crankshaft 10 against the urging force of the spring 36. It is configured.

The spring 36 is contracted between the medium diameter portion 24 of the rotating body 20 and the rising end surface of the boss portion of the connecting gear 46, which will be described later, so as to surround the periphery of the moving body 30. Therefore, the moving body 30 (connecting gear 46) is biased in the direction of arrow P by the elastic force of the spring 36. At this time, as described above, the outer diameter of the moving body 30 is formed slightly smaller than the inner diameter of the small diameter portion 23 of the rotating body 20, and the pressure oil in the oil chamber 38 described later is discharged. So spring 3
Due to the urging force of 6, the moving body 30 moves smoothly in the direction of arrow P without being hindered by pressure oil or the like.

The hydraulic mechanism includes the flange portion 37 of the moving body 30, the hydraulic pressure 38, the hydraulic device 39, and the like.

The flange portion 37 of the moving body 30 has a larger diameter than the other portions of the moving body 30, and the large diameter portion 28 of the rotating body 20.
It is formed so as to be slidable in the axial direction. The oil chamber 38 includes the flange portion 37 and the large diameter portion 2 of the rotating body 20.
8 is formed between the wall surface 29 and the wall surface 29. Hydraulic system 39
Is configured to supply pressure oil to the oil chamber 38 and to discharge the supplied pressure oil.

Therefore, when the hydraulic device 39 is operated to supply the pressure oil in the oil chamber 38, the moving body 30 is pushed by the pressure oil via the flange portion 37 and moves in the arrow Q direction.

The connecting means 40 includes an internal gear 47 fixed to the end surface of the crankshaft 10 on the rotating body side, an internal gear 48 fixed to the end surface of the rotating body 20 on the crankshaft side, and an end surface of the moving body 30 on the crankshaft. External gear 4 which is fixed to the internal gear 47 and can be meshed with the internal gear 47 (and can be disengaged from the internal gear 47).
6 and 6. When the moving body 30 (and hence the external gear 46) is moved to the crankshaft 10 side by the moving means 35, the internal gears 47 and 48 are connected via the external gear 46. In this state, the crankshaft 10 and the rotating body 20 are connected so as to be synchronously rotatable, that is, the crankshaft 1
The rotation of 0 is transmitted to the rotating body 20.

On the other hand, when the moving body 30 is moved to the side opposite to the crankshaft 10, the external gear 46 is disengaged from the internal gear 47. In this state, the crankshaft 10 and the rotating body 20 are separated so as to be relatively rotatable, that is, the rotating body 20 is separated from the crankshaft 10.
Can rotate independently. Furthermore, the rotary body 20 is connected with a rotation driving means 55 for rotating the rotary body 20 at a predetermined angular interval when the rotary body 20 is separated from the crankshaft 10.

The rotation drive means 55 is composed of a gear train 57 having a gear 56, a drive motor (not shown), and the like. Gear 5
6 is fixed to the rotating body 20, and the drive motor is configured to rotate the rotating body 20 in the forward and reverse directions via the gear train 57.

Further, in this embodiment, the crankshaft 10 and the rotating body 2 are
A control device 60 for controlling the hydraulic device 39, the rotation drive means 55 and the like is provided in order to automatically connect and disconnect 0. Details of the function of the control device 60 will be described below with reference to the flowchart shown in FIG.

Next, the operation of this embodiment will be described.

In FIG. 3, when there is an adjustment work command for switching knockout timing (step S10), the control device 50
The crankshaft 10 is rotated in a state in which the rotating body 20 is coupled, the crankshaft 10 and the rotating body 20 are positioned at predetermined positions, and then stopped. Next, the control device 60
Drives the hydraulic device 39 to supply pressure oil to the oil chamber 38 (step S12). Then, the moving body 30 moves the moving means 3
5 moves in the direction of arrow Q against the elasticity of the spring 36. As a result, the meshing state between the external gear 46 and the internal gear 47 is released, and the internal gears 47 and 48 are separated. The fact that the two internal gears 47 and 48 are separated means that the switching detector 6
This is detected by the fact that 5 is turned on (step S14).

When both the internal gears 47 and 48 are separated and the rotating body 20 is separated from the crankshaft 10, the control device 60 controls the angle amount corresponding to the switching amount of the knockout timing input via the switch 61. The rotation drive means 55 is drive-controlled so that the rotating body 20 rotates (step S).
16). At this time, the amount of rotation of the rotating body 20 is detected by a rotary encoder (not shown), so that the rotating body 20 is accurately rotated by the set angle amount (step S18). In this embodiment, the amount of rotation can be set at intervals of 5 degrees.

In this way, when the rotating body 20 rotates by the set angle amount, the knockout pin is operated by the knockout cam 11. At the same time, the clamp / unclamp cam 12,
The lift-down cam 13 and the advance-return cam 14 cause the feed bar of the transfer device to perform advance-return operation, lift-down operation, and advance-return operation.

Therefore, without rotating the crankshaft 10, by independently driving the transfer device and the knockout pin,
It is possible to confirm the operation of the fingers of the transfer device. Further, since the relative rotational position between the crankshaft 10 and the rotating body 20 can be changed by the rotation driving means 55, the operation timing of these transfer devices and the operation timing of the knockout pin can be adjusted efficiently and easily. .

After adjusting the operation timing in this way, the control device 60 drives the hydraulic device 39 to discharge the pressure oil in the oil chamber 38 (S20). Then, the moving body 30 moves in the direction of arrow P by the elastic force of the spring 36 and moves to the internal gear 47.
And the internal gear 48 are connected via the external gear 46. At this time, the connection of the internal gears 47 and 48 is detected when the switching detector 65 is turned off (step S22). The connected state is maintained by the urging force of the spring 36.

When the press machine is operated in this state, the rotation of the crankshaft 10 is transmitted to the rotating body 20. Therefore, the knockout pin is operated and the feed bar performs the advance return operation, the lift down operation, and the advance return operation in association with the vertical movement of the slide.

Thus, according to the present embodiment, the clamp / unclamp cam 12, which is provided coaxially with the crankshaft 10 so as to be rotatable and axially non-displaceable on the machine body 1, the advance
A rotary body 20 to which the return cam 14 and the knockout cam 11 are attached in a predetermined positional relationship, a movable body 30 axially movably mounted in a hollow portion 22 of the rotary body 20, and the movable body 30 Moving means 35 for moving
When the moving body 30 is moved to the crankshaft 10 side by the moving means 35, the crankshaft 10 and the rotating body 20 are connected so as to be synchronously rotatable, and the moving body 30 is opposite to the crankshaft 10. State in which the moving body 30 is moved to the opposite side of the crankshaft by the connecting means 40 that relatively rotatably separates the crankshaft 10 and the rotating body 20 when moved to the side, and the moving means 35. In the rotary drive means 5 for rotating the rotating body 20
5 is provided, and therefore, when the rotating body 20 is moved to the side opposite to the crankshaft 10 by the moving means 30, the rotation driving means 55 is kept with the crankshaft 10 stopped.
Allows the transfer device and knockout pin to be activated.

Therefore, the transfer device and the knockout pin can be operated under the same conditions as the regular work while the slide is stopped, so that the work can be performed safely. Moreover, the timings of the knockout operation and the transfer device can be adjusted at the same time simply by changing the phases of the crankshaft 10 and the rotating body 20, so that the timing adjustment can be performed efficiently and easily.

Further, by moving the moving body 30 in the axial direction by using the moving means 35, the crankshaft 1 is connected via the connecting means 40.
Since 0 and the rotating body 20 are coupled and separated, the knockout cam 11 and the cam follower 5 do not move relative to each other in the axial direction. As a result, the cam 11 and the cam follower 5
Can be minimized within a range capable of transmitting a sufficient knockout driving force. Therefore, the knockout device does not become large and complicated. Further, since the area of the outer peripheral surfaces of the cam 11 and the cam follower 5 that abut and engage with each other can be minimized, the planar accuracy is not required over a wide range, and the difficulty of processing is solved. The cost can be reduced.

In addition, all the cams 11, 12, 13, and 14 are attached to the rotating body 20.
Since it is concentrated in the area, a compact layout is possible.

(Second Embodiment) A second embodiment is shown in FIGS. 4 and 5.

In addition to the first embodiment, in a 3000 ton class super-large press that requires a knockout force of, for example, 200 ton, the cam 11 and the like need to be large in size because it is necessary to secure a corresponding strength. . Further, in such an ultra-large press, it is necessary to refuel more smoothly.

Therefore, in order to disperse and reduce the knockout driving force to be transmitted and to perform smooth oil supply, the rotating body 20 and the like are attached to both ends of the rotating shaft 10 as shown in FIGS. 4 and 5. This is a second embodiment (however, in FIG. 5, only the rotating body 20 on one side is shown, and the rotating body 20 on the other side is omitted. In FIG.
Is a bolster and 11c is a knockout unit including a knockout pin and the like. ).

Here, in order to perform smooth oil supply in the second embodiment,
A hollow portion 33 is formed by penetrating the moving body 30 along the axis, and the small-diameter protruding portion 1 of the crankshaft 10 is inserted into the hollow portion 33.
0a is inserted so as to be relatively movable in the axial direction. Then, the oil passage 70 is formed by utilizing the small diameter protrusion 10a. As a result, the lubricating oil can be smoothly supplied to each part such as the rotating body 20.

In the first and second embodiments described above, the cam 11 and the rotating body 20 are key-coupled as separate bodies.
20 may be integrally formed.

Further, although the controller 60 is provided to achieve the full automation, the moving means 35 may be operated manually or semi-automatically, or the rotating body 20 may be rotated. In the case of this system, the control is performed. The device 60 can be further simplified and even omitted.

Furthermore, although it was configured using a three-dimensional transfer device,
It may be a press machine for forging provided with a two-dimensional transfer device. That is, a press machine for forging provided with a transfer device that performs the clamp / unclamp operation by the clamp / unclamp cam and the advance / return operation by the advance / return cam 14 may be used.

Further, the moving means 35 is connected to the spring 36 and the hydraulic mechanism (3
7, 38, 39), but both may be constituted by a hydraulic mechanism.

[Advantages of the Invention] As described above, according to the present invention, the transfer device and the knockout pin can be operated with the crankshaft stopped, that is, with the slide stopped, and the operation confirmation of the transfer device and the like can be performed safely. Can be done. Furthermore, the timing of the transfer operation and the timing of the knockout operation can be adjusted at the same time. Therefore, the work can be performed safely, efficiently and easily.

[Brief description of drawings]

1 to 3 are views showing an embodiment of the present invention. FIG. 1 is a sectional view of a main part, FIG. 2 is a block diagram, and FIG. 3 is a flow chart for explaining the operation. 4 and 5
FIG. 4 is a view showing another embodiment of the present invention, FIG. 4 is a schematic view showing a main part, and FIG. 5 is a sectional view of the main part. FIG. 6 is a schematic view of a knockout device mounted on a conventional forging press machine. DESCRIPTION OF SYMBOLS 10 ... Crank shaft, 11 ... Knockout cam, 12 ... Clamp / unclamp cam, 13 ... Lift down cam, 14 ... Advance return cam, 20 ... Rotating body, 30 ... Moving body, 35 ... Moving means , 40 ... Coupling means, 55 ... Rotation driving means.

Claims (1)

[Scope of utility model registration request] 1. A clamp / unclamp operation is performed by at least a clamp / unclamp cam, and
In a forging press machine equipped with a transfer device that performs an advance / return operation by an advance / return cam and a knockout cam that raises / lowers a knockout pin, it is rotatable coaxially with the crankshaft and rotatable in the axial direction. A rotating body which is provided so as not to be displaceable and to which the clamp / unclamping cam, the advance / return cam and the knockout cam are attached in a predetermined positional relationship, and a hollow body of the rotating body which is movably mounted in the axial direction. A moving body; a moving means for moving the moving body; and a crankshaft and the rotating body which are synchronously rotatably connected when the moving body is moved to the crankshaft side by the moving means, and the moving body When it is moved to the opposite side of the crankshaft, the crankshaft and the rotating body are relatively rotatable. A forging press comprising: a connecting means for separating; a rotation driving means for rotating the rotating body in a state in which the moving body is moved to the side opposite to the crankshaft by the moving means. Machine independent drive.