JPS62161437A - Transfer feed press - Google Patents

Abstract

PURPOSE:To prevent an interference of an upper metallic die and a feed bar by providing an interference avoiding device provided with a guide means for restoring synchronously an operative relation of an ascending/descending motion and a horizontal reciprocating motion. CONSTITUTION:A press slide motion is converted to an ascending/descending motion of a slider 56 and a guide pin 58 through an eccentric shaft 38, a gear 42 of a gear train 37..., a lever 54, and a rod 56, and fetched. When the slider 56 and the guide pin 58 ascend and descend, the slider 57 slides a guide groove 57 of a guide plate 60, and the guide pin 58 slides a guide groove 62 of a guide plate 61. Therefore, by the press slide motion, a transfer feed motion is controlled, and a rod 16 and a feed bar 10 execute a prescribed operation. Accordingly, the feed bar 10 and an upper metallic die 40 do not interfere with each other.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a transfer feed that can avoid interference between an upper mold and a feed bar even when unexpected disturbances occur due to external noise, etc. It's about the press.

[Prior Art] A mechanism for operating a transfer feed device of a transfer feed press using a DC servo control system is shown in FIG. A rod 3 having a rack 2 engraved thereon is fixed to the rod 1, and the rack 2 of the rod 3 has a
A pinion 5 that can be rotationally driven by a drive device 4
are meshing. In addition, a shaft 8 is fixed to a stand @ 7 that can reciprocate in the swinging direction of the arm 1.
A lever 9 fixed to the lever 8 is pivotally connected to the upper end of the arm 1, and a feed bar 10 is attached to the shaft 8 so as to be able to reciprocate as the arm 1 swings.

A rack 17 is carved at a predetermined position of the two left and right rods 16 which can be pushed and pulled in a direction parallel to the feed bar 10 via a pinion 14 and a rack 15 by the drive devices 13 arranged on the left and right. , the rack 17 has a vertical axis 1
A pinion 19 fixed to the lower end of the left and right vertical shafts 18 meshes therewith, and a bevel gear 20 is fixed to the upper end of one of the left and right vertical shafts 18, and a pinion 21 is fixed to the upper end of the other vertical shaft 18.

A bevel gear 23 is fixed to one end of a shaft 22 arranged perpendicularly to the left and right feed bars 10 on the clamp device 12, and pinions 24 and 25 are fixed to the vicinity of both left and right ends, respectively. The pinions 24 and 25 are attached to the left and right clamp frames 26 and 27 of the clamping device 12 (the rack 28 of the vertical rod
．． 29, and one of the drives 13 drives the rod 16, the vertical shaft 18, and the bevel gears 20, 23.1.
By rotating the pinion 24.25 via the FIII 22, the clamp frame 26.27 can be raised and lowered.

Further, rods 32 and 33 having racks 30.31 engraved in parallel with the axis 22 are attached to the clamp frame 26.27, and the racks 30.31 of the rods 32.33 are rotatably attached to the clamp housing 11. The pinion 21 is engaged with the rack 35 formed on the rod 33, and the other drive device of the drive devices 13 pushes and pulls the rod 33 via the rod 16, [11B, and pinion 21. At the same time, by pushing and pulling the rod 32 via the rod 33 and pinion 34, the clamp frames 26 and 27 move in opposite directions and the workpiece 36 is moved.
It is possible to approach or move away from the enemy. Further, the clamp frames 26 and 27 are provided with a clamp body (not shown), which is adapted to grip or release the work 36.

On the other hand, the drive mechanism of the mold that is pulled into the transfer feed press is shown in FIG.
An upper die 40 is connected to the lower end of a connecting rod 39 which is fixed to the eccentric portion of the eccentric wheel shaft 38, and allows the upper die 40 and the lower die 41 to press the workpiece 36 into a predetermined shape. It has become.

In the transfer feed press described above, the feed bar 10 is fed by reciprocating the feed bar 10 by the drive device 4, and the feed bar 10 is raised by one of the two sets of drive devices 13.
The workpiece is lowered, and the feed bar 10 grips and releases the workpiece by the other drive device 13, and the locus of this series of movements is as shown in FIG.

When the workpiece 36 is grabbed by the transfer feed device, the workpiece 36 is set on the lower mold through the steps of raising → feeding → lowering. The upper die 40 fixed to the slide descends, and the workpiece 36 is pressed by the upper die 40 and the lower die 41. After pressing, the upper die 40 rises, and the feed bar 10 moves to grab the next workpiece. Return to original position.

The motion curve of the upper mold 40 and the feed bar 10 during the above-mentioned pressing operation is as shown in FIG. 7, where A is the curve of the upper mold 40 and the mouth is the curve of the transfer feed device. In FIG. 7, the upper mold 40 and the transfer feed device do not malfunction, and press is performed without any trouble without interfering with each other. However, if a malfunction occurs, there is a risk of interference between the upper mold 40 and the transfer foot device, and to prevent this, D
In a transfer feed press using the C servo control system, a feedback circuit is provided in the control system for errors in the motion characteristics of each drive device to maintain accuracy during operation. In addition, 11 in FIG. 4 is a clamp housing.

[Problems to be Solved by the Invention] However, with the above device, there is a limit in preventing disturbances in the movement of the transfer feed device due to unexpected circumstances such as external noise.

The present invention has been made in view of the above-mentioned circumstances, with the object of preventing interference between the upper mold and the feed bar.

[Means for Solving the Problems] The present invention provides a device for extracting an eccentric wheel shaft angle from a gear train that drives a mold and converting it into a lifting motion, a device for extracting a transfer feed motion of a transfer feed device, and a device for extracting a transfer feed motion from a transfer feed device; It has a configuration in which an interference avoidance device including a guide means for avoiding synchronized restoration of the operational relationship of horizontal reciprocating motion is provided.

[Function] Therefore, in the present invention, the vertical motion by rotation of the eccentric shaft for driving the mold and the transfer feed motion of the transfer feed device are performed according to a predetermined operation curve, and interference between the mold and the clamp device is avoided. be done.

[Example] Hereinafter, an example of the present invention will be described with reference to the accompanying drawings.

1 to 3 show an embodiment of the present invention, in which a shaft 43 to which required gears 42 of a gear train 37 are fixed has a bevel gear 4.
4 is attached to the bevel gear 44, and a vertical shaft 45 is attached to the bevel gear 44.
A bevel gear 46 fixed to the upper end is engaged. A gear 49 and a cam 50 are fixed to a shaft 48 disposed at the lower part of the frame 47, and a gear 51 of a gear box connected to the lower end of the shaft 45 meshes with the gear 49. Moreover, two sets of levers 53. are attached to a shaft 52 arranged parallel to the shaft 48.
54 are fixed in a phase-shifted manner, a roller 55 is pivotally attached to the tip of the lever 53, and a roller 55 abuts the edge of the cam 50, and the lever 54 is connected to a rond 56 which is movable up and down.

Furthermore, a guide pin 58 to which a slider 57 having a rectangular cross section is fixed is pivotally attached to the tip of the iron 56.

A guide plate 60 having a guide groove 59 extending vertically is fixed on the frame 47.
The slider 57 is slidably fitted into the slider 9 . Further, a guide plate 61 is fixed to the rod 16, and the guide plate 6
The guide pin 58 is slidably fitted into the guide groove 62 provided in the guide groove 1 . The shape of the guide groove 62 is determined to have a unique correlation curve so as to maintain the mutual relationship between the press slide motion and the transfer feed motion, so that the upper die 40 and the feed bar 10 do not interfere with each other. There is. Further, in the above device, each intermediate gear ratio is determined so that the rotation speed of the eccentric wheel shaft 38 and the rotation speed of the lTl 1148 are the same, and the levers 53 and 54
The lever ratio is determined so that the slider 57 and the guide pin 58 move up and down a required amount (for example, 1/2 of the lifting stroke of the upper mold 40).

With the above configuration, the press slide motion includes the eccentric wheel shaft 38, the gear 42 of the gear train 37, the shaft 43, the bevel gear 44, 46, the shaft 45, the gears 51, 49, the shaft 48,
Cam50. Lever 53, shaft 52, lever 54, rod 5
6, the slider 57 and the guide pin 58 are converted into vertical movement and taken out. When the slider 57 and the guide pin 58 move up and down, the slider 57 slides on the guide groove 57 of the guide plate 60, and the guide pin 58 slides on the guide groove 62 of the guide plate 61, so the above-mentioned press slide The transfer feed motion is regulated by the motion, and therefore the rod 16 and the feed bar 10 perform predetermined movements, so the feed bar 10 and the upper mold 40 do not interfere with each other.

If either the press slide motion or the transfer feed motion deviates from the predetermined operation, the guide pin 58 will move against the guide groove 62! Because I will not be able to attend school,
By detecting this with appropriate means, the drive device 4,
13 is stopped.

It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

[Effect of the invention] According to the tiger and sfer feed press of the present invention, D
Even if there is unexpected disturbance in the C servo control due to external noise, etc., the press slide motion and transfer 1 feed motion can be operated according to the predetermined operation trajectory, preventing malfunctions of the upper mold and transfer feed device. This can have the excellent effect of improving safety.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of an embodiment of the transfer feed press of the present invention, Fig. 2 is a view taken in the direction of the -n arrow in Fig. 1, and Fig. 3 is a detailed view of the interference avoidance portion in Fig. 1. , Fig. 4 is a general explanatory diagram of the feed mechanism of the transfer feed press, Fig. 5 is an explanatory diagram of the same mold elevator, H4, and Fig. 6 is an explanatory diagram of the feed mechanism of the transfer feed press.
The figure is an explanatory diagram of the operation trajectory of the transfer feed device and the upper mold, and FIG. 7 is an explanatory diagram of the motion curve of the same mold and the transfer feed device. In the figure, 1 is an arm, 4 is a drive device, 12 is a clamp device,
13 is a drive device, 38 is an eccentric wheel shaft, 40 is an upper mold, 45
is the shaft, 49 is the gear, 50 is the cam, 51 is the gear, 53, 5
4 is a lever, 56 is a rod, 57 is a slider, 58 is a guide pin, 59 is a guide groove, 60, 61 is a guide plate, and 62 is a guide groove.

Claims (1)

[Claims] 1) A device that extracts the eccentric wheel shaft angle from the gear train that drives the slide and converts it into a vertical movement, a device that extracts the transfer feed motion of the transfer feed device, and a guide means that restores the synchronization of the operational relationship between the vertical movement and the transfer feed motion. A transfer feed press characterized in that it is equipped with an interference avoidance device.